Water Resources Review – June 2002

Updated: July 1, 2002

See definitions.

Maryland And Delaware. -- Streamflow decreased throughout the entire bi-state area. In Western Maryland and on the upper Potomac River,  streamflow decreased, and remained in the normal range. In Central Maryland, flows decreased, and moved from the normal into the below-normal range. Flows on the lower Potomac River decreased, and moved from the normal into the below-normal range. In northeast Maryland, at the index station on Deer Creek, flows decreased, and continue to remain in the below-normal range (13 of the last 14 months below normal flows). On the Eastern Shore, streamflow decreased, and remains in the normal range. Lowest monthly June flows for the period of record at the index station on Deer Creek (also record low single day). 

Contents of the Baltimore reservoir system decreased slightly, and near month's end were 62 percent of capacity. End of month contents = 46,900 million gallons.  Contents of the Triadelphia  and Duckett reservoirs, near month’s end, were 7.06 billion gallons, 67 percent of capacity.

Surface Water Data -- June 2002

[% = percent; ft³/s = cubic feet per second; in. = inches; Date = day of month;
1 = Includes diversions for water supply; * = Above normal range; # = Below normal range]

Station name

Discharge

Runoff
(in.)

Cumulative runoff

Maximum
(ft3/s)
---
(Date)

Minimum
(ft3/s)
---
(Date)

Mean
(ft3/s)

Percent of
normal

Total
(in.)

Percent of
normal

Departure
(in.)

Potomac R at
Paw Paw, W.Va.

 1470

62

0.52

7.61

51

-7.29

2940
(1)

706
(30)

Seneca C at
Dawsonville, Md.

#55.4

58

0.61

7.38

48

-7.92

205
(15)

30
(26-28, 30)

Potomac R near
Washington, D.C. 1

#4470

48

0.44

4.90

36

-8.70

9380
(1)

2140

(30)

Deer C near 
Rocks, Md.

#35.5

38

0.42

4.36

28

-11.34

100
(7)

19
(30)

Choptank R near
Greensboro, Md.

 56.6

80

0.56

4.89

31

-10.71

     222
      (8)

23
(30)

Normal is defined as the median (50th percentile) of long-term monthly-mean discharge or monthly total runoff. The normal range is defined as discharge or runoff falling between the 75th and 25th percentiles of long-term records. 

Ground Water Data – June  2002

Detailed ground-water information for Maryland and Delaware is available at http://md.water.usgs.gov/groundwater/.

Potomac River near Washington, D.C.  -  June 2002

Last day: 2,140 cubic feet per second (estimated).
Reference period: 1971 to 2000.

Chesapeake Bay – June 2002

Total flow into the Chesapeake Bay was about 40.6 billion gallons per day, (BGD) 98 percent of average. June average: 41.5 BGD.

The three largest rivers flowing into the Chesapeake Bay contributed about 88 percent of total inflow in June, with individual contributions of:

River

Percentage of total inflow
to Chesapeake Bay

Susquehanna River

75

Potomac River

10     

James River

                  3

Total

88

Other rivers

12

Flow of the James River was lowest June for the period of record, with contribution of 1.2 BGD breaking previous record set in 1999 of 1.4 BGD.

 

Period of record: 1937 to Present. 

Related Information

Reports for previous months

Monthly Water Conditions in the Chesapeake Bay Region

National Water Conditions

Definitions of terms

Northeast Regional Climate Center (from Cornell University)

Monthly Climate Summary

For additional information, contact:

info@md.water.usgs.gov or call 410-238-4200.